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april 13, 2011

comScore Releases March 2011 U.S. Search Engine Rankings

RESTON, VA, April 13, 2011 – comScore, Inc. (NASDAQ: SCOR), a leader in measuring the digital world, today released its monthly comScore qSearch analysis of the U.S. search marketplace. Google Sites led the explicit core search market in March with 65.7 percent of search queries conducted.

*“Explicit Core Search” excludes contextually driven searches that do not reflect specific user intent to interact with the search results.

More than 16.9 billion explicit core searches were conducted in March. Google Sites ranked first with 11.1 billion searches, followed by Yahoo! Sites with 2.7 billion, Microsoft Sites with 2.4 billion, Ask Network with 520 million and AOL, Inc. with 272 million.

* “Total Core Search” is based on the five major search engines, includingpartner searches, cross-channel searches and contextual searches. Searchesfor mapping, local directory, and user-generated video sites that are not on thecore domain of the five search engines are not included in these numbers.

In order to accurately represent the continued evolution of the search landscape, comScore is providing insight into the share of algorithmic explicit searches that are powered by Google and Bing, and branded as such to the consumer. Google’s “powered by” share is composed of searches conducted at Google entities, as well as branded searches at AOL and Ask. Bing’s “powered by” share is composed of searches conducted at Microsoft entities as well as branded Yahoo! entities.

In March, 68.2 percent of searches carried organic search results from Google, while 26.4 percent of searches were powered by Bing organic results.

About comScorecomScore, Inc. (NASDAQ: SCOR) is a global leader in measuring the digital world and preferred source of digital business analytics. For more information, please visit www.comscore.com/companyinfo.